Chimney Flashing

Blog September 26, 2020

Having a fireplace in a home is something many people want. But even though it’s a very appealing addition, having a fireplace and a chimney comes at a price.

Namely, the chimney is a weak point in the roof that often becomes the source of leaks, leading to various issues like mold, wall damage, and even structural problems.

The good news is that with the help of chimney flashing, most of these issues can be prevented.

But what is chimney roof flashing? And how to install flashing around a chimney?

Let’s go through the most important aspects of the topic below.

What is Chimney Flashing? 

Chimney flashing is the process of sealing your chimney so that it becomes waterproof and doesn’t leak water. In this situation, the word flashing refers to the part where the chimney meets the roof and the metal sheet used to redirect the water flow and put less strain on the vulnerable area.

Because chimneys are a vulnerability, no matter how well they are installed, adding metal roof chimney flashing can act as an additional barrier that relieves some of the pressure and helps your chimney remain waterproof for much longer.

If chimney flashing is installed correctly, it can offer protection for 30 years or even longer, especially if you install it together with the chimney itself, and there isn’t any prior damage.

Types of Roof Flashing

The type of roof flashing that you’ll need depends on what type of a roof and chimney you have. And that will also have an impact on the best roof flashing installation you should use.

Let’s look at some of the most common types and when to use them.

Continuous Flashing

Continuous flashing is a type of flashing around chimney method that uses a single piece of metal to carry water down to the shingles below, protecting the chimney from heavy water flow. 

One of the most important things to consider when figuring out how to install flashing around the chimney using this method is the contraction and expansion of the house as the seasons change. To accommodate for that, you’ll need to use expansion joints that can adjust accordingly.

Step Flashing

Step flashing is another popular method that directs water flow away from the chimney wall towards the lower parts of the roof.

Base Flashing

With base flashing, you would install an additional surface at the chimney base, which would direct the water downward. Usually, base flashing is used together with counter flashing, which ensures that the whole system stays secure.

Chimney Roof Flashing Materials

Just as there are multiple types of roofs you can opt for, there are also a few different roof flashing materials that you can use depending on your situation. 

Aluminum roof chimney flashing is always a popular option because it’s affordable, holds up relatively well, and is also resistant to rust. 

If you don’t mind splurging, copper is an excellent option. It’s not only very durable but is also lightweight and is resistant to rust. What’s more, it’s one of the nicest-looking options, as the shiny qualities of copper can be a nice touch to your roof’s look.

If you live in a warm climate, you could consider PVC flashing around the chimney, as it’s quite affordable. But if you have extreme weather conditions and harsh winters, the material doesn’t hold up very well.

How to Install Flashing Around a Chimney

One of the main reasons why so many people type in “roof flashing near me” into the search bar is because the process can be fairly complicated. 

Even seemingly minor mistakes can have significant long-term consequences, so you must follow the best practices and understand how to use the different methods listed in the previous sections.

First, you will need to install the base flashing and bend them in an L shape along the chimney line. Once you are sure that there are no cracks, you can add the counter flashing, which is embedded in the chimney’s mortar joint.

Need-to-Know Roof Flashing Repair Tips

Even if roof flashing was installed correctly, you might need to repair it once in a while, either from damage or from natural deterioration.

Some of the common issues you might face include corrosion, damage from storms, dried out sealant, or even loose nails or flashing parts.

In any of these situations, it’s always a good idea to consult with a professional construction company that can give you a better idea of what happened and how to best proceed.

If the flashing parts are not damaged and can be removed safely, you might actually be able to reuse at least some of them, but it’s often better to opt for new flashing if you want not to have to worry about it in the near future.

Why Choose JAE Construction

Chimney flashing is an essential process that ensures the integrity of your roof and helps prevent leaks. But figuring out which type of flashing method and material to use can be tricky.

At JAE Construction, we have the experience in the Boca Raton roofing industry to help you in any situation, so if you’re typing “chimney flashing repair near me” into Google or have any other issues, call us at 954-357-0560 or fill out a form, and we’ll help you find the best solution.